Destry talked about signing, both of transactions and messages in ethereum and introduced ecrecover() in solidity. Part 1 of 2 on ecrecover and message signing.
Tucson Blockchain Developers Meetup - Sept 27 - Signed messages in ethereum p...Destry Saul
1) The document summarizes how to use signed messages in Ethereum smart contracts to verify data approval and private key ownership without requiring the signer's address to be funded.
2) Examples are provided for using signed messages to implement a kill switch, multisig functionality, a hot wallet to submit transactions without funding user addresses, and registering user addresses to access a contract.
3) Considerations discussed include preventing signature replay, tracking nonces, and broadcasting off-chain signatures to act as a simple oracle without spending gas.
This is a presentation is an introduction to the blockchain. It defines, what is the blockchain and shows how JavaScript developers can create blockchain applications.
Technical toolkit for a blockchain startupPortia Burton
Portia Burton provides a technical toolkit for blockchain startups. She recommends paying attention to key indicators like number of stars, commit frequency, and number of contributors when choosing an open source blockchain project. The toolkit includes Solidity for smart contract programming, Truffle as a development framework, and Glitch for prototyping without devops experience. Burton is available for contact on her website, Twitter, and Medium to help explain blockchain concepts.
A general overview of the parsing process. Presented at the Eclipse Based Development and Integration course (https://inf.mit.bme.hu/en/edu/courses/eafi). Slides by Oszkar Semerath.
The document discusses analyzing cryptocurrencies with Python. It introduces Portia Burton, a developer and crypto fan, and their Blockchain Explainer company. It then covers why blockchains are important, what cryptocurrencies are, how they fit into modern portfolio theory, metrics for measuring portfolio performance like standard deviation and correlation, and how Python tools like Pandas, Pyfolio, and Requests can help evaluate cryptocurrencies. The document includes slides on blockchain properties, why blockchains are gaining importance, the differences between utility and security tokens, and a demonstration of using Python for cryptocurrency analysis.
Javascript toolset for Ethereum Smart Contract developmentBugSense
This document provides an overview of Ethereum and tools for Ethereum development. It discusses what Ethereum is, how smart contracts work, and tools like Solidity, web3.js, Truffle, Ganache, MetaMask and Etherscan that allow developers to build decentralized applications on Ethereum. Key aspects covered include the Ethereum Virtual Machine, gas costs, wallets, nodes, testing smart contracts, deploying contracts, and exploring the blockchain through a block explorer.
Kriptovaluták, hashbányászat és okoscicákhackersuli
Zoltan Balazs provides a simplified explanation of Ethereum smart contracts for a five-year-old audience. He begins by explaining blockchain and cryptocurrencies using metaphors involving math puzzles and a fictional currency called "moneZ". He then explains how smart contracts allow digital agreements to be "carved into stone" by encoding them as code on the blockchain. Smart contracts use a programming language called Solidity and run on Ethereum's virtual machine. While promising, smart contracts also introduce new hacking risks as code vulnerabilities cannot be fixed like legal contracts. Examples of past hacks involving The DAO and a Parity wallet library vulnerability are briefly described to illustrate this risk.
Tucson Blockchain Developers Meetup - Sept 27 - Signed messages in ethereum p...Destry Saul
1) The document summarizes how to use signed messages in Ethereum smart contracts to verify data approval and private key ownership without requiring the signer's address to be funded.
2) Examples are provided for using signed messages to implement a kill switch, multisig functionality, a hot wallet to submit transactions without funding user addresses, and registering user addresses to access a contract.
3) Considerations discussed include preventing signature replay, tracking nonces, and broadcasting off-chain signatures to act as a simple oracle without spending gas.
This is a presentation is an introduction to the blockchain. It defines, what is the blockchain and shows how JavaScript developers can create blockchain applications.
Technical toolkit for a blockchain startupPortia Burton
Portia Burton provides a technical toolkit for blockchain startups. She recommends paying attention to key indicators like number of stars, commit frequency, and number of contributors when choosing an open source blockchain project. The toolkit includes Solidity for smart contract programming, Truffle as a development framework, and Glitch for prototyping without devops experience. Burton is available for contact on her website, Twitter, and Medium to help explain blockchain concepts.
A general overview of the parsing process. Presented at the Eclipse Based Development and Integration course (https://inf.mit.bme.hu/en/edu/courses/eafi). Slides by Oszkar Semerath.
The document discusses analyzing cryptocurrencies with Python. It introduces Portia Burton, a developer and crypto fan, and their Blockchain Explainer company. It then covers why blockchains are important, what cryptocurrencies are, how they fit into modern portfolio theory, metrics for measuring portfolio performance like standard deviation and correlation, and how Python tools like Pandas, Pyfolio, and Requests can help evaluate cryptocurrencies. The document includes slides on blockchain properties, why blockchains are gaining importance, the differences between utility and security tokens, and a demonstration of using Python for cryptocurrency analysis.
Javascript toolset for Ethereum Smart Contract developmentBugSense
This document provides an overview of Ethereum and tools for Ethereum development. It discusses what Ethereum is, how smart contracts work, and tools like Solidity, web3.js, Truffle, Ganache, MetaMask and Etherscan that allow developers to build decentralized applications on Ethereum. Key aspects covered include the Ethereum Virtual Machine, gas costs, wallets, nodes, testing smart contracts, deploying contracts, and exploring the blockchain through a block explorer.
Kriptovaluták, hashbányászat és okoscicákhackersuli
Zoltan Balazs provides a simplified explanation of Ethereum smart contracts for a five-year-old audience. He begins by explaining blockchain and cryptocurrencies using metaphors involving math puzzles and a fictional currency called "moneZ". He then explains how smart contracts allow digital agreements to be "carved into stone" by encoding them as code on the blockchain. Smart contracts use a programming language called Solidity and run on Ethereum's virtual machine. While promising, smart contracts also introduce new hacking risks as code vulnerabilities cannot be fixed like legal contracts. Examples of past hacks involving The DAO and a Parity wallet library vulnerability are briefly described to illustrate this risk.
Stefano Maestri - Blockchain and smart contracts, what they are and why you s...Codemotion
After a brief introduction on what is blockchain technology and how it works under the wood, focusing on Ethereum the next generation blockchain implementation. We will focus on the concept of smart contract introducing it through a simple case study and its standard implementation in ethereum. We will code it using Solidity language deploying and testing it in a live demo on Ethereum test network.
By the end of this webinar you should be able to understand
The concepts, use cases and basics of smart contracts
How Blockchain and smart contracts work and developer success
How smart contracts work on both the Ethereum and Hyperledger platforms from a practical level
The constructs of smart contract, common coding requirements and demos
What are the most in demand Blockchain Certifications?
How do these certification meet the needs of todays Enterprises?
What about Blockchain Career Demand?
Cryptocurrencies for Everyone (Dmytro Pershyn Technology Stream)IT Arena
The document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency as a digital currency that uses encryption techniques to regulate currency units and verify fund transfers outside of central bank control. Bitcoin is highlighted as the first decentralized digital currency, used for online payments and traded on exchanges. Key differences between traditional currencies and Bitcoin are outlined. The document then covers various technical elements that underpin cryptocurrencies like decentralization, distributed consensus, digital signatures, hash functions, and blockchain data structures. It provides examples of how cryptocurrency and Bitcoin systems work at a technical level.
Dylan Butler & Oliver Hager - Building a cross platform cryptocurrency appDevCamp Campinas
This document discusses building a cross-platform cryptocurrency application. It covers using a monorepo architecture for code reuse across mobile, desktop, and npm library applications. It also discusses developing cryptocurrency wallet features like generating transactions and signatures, smart contracts, and blockchain basics.
Blockchain Essentials and Blockchain on AzureNuri Cankaya
In this presentation I cover from the basics of Blockchain and deep-dive into the possibilities with Microsoft Azure on Blockchain projects.
What is Blockchain
Blockchain Disruption
Blockchain Business Scenarios
Microsoft’s Strategy on Blockchain
Blockchain 2.0: Smart Contracts
Blockchain 3.0: Cryptlets innovation
Blockchain on Microsoft Azure
Bletchley Project
Azure Blockchain Solutions
Smart contract honeypots for profit (and fun) - bhaPolySwarm
This document discusses various "smart contract honeypots" that appear vulnerable but are actually designed to exploit would-be attackers. It provides examples like a wallet with a reentrancy bug that doesn't actually allow funds to be stolen, and a gambling contract that displays a fake winning number. The document aims to educate about unintuitive behaviors in Ethereum and Solidity that honeypot designers exploit. It also notes the need for block explorer tools to carefully validate contract code and data.
This document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency and describes how Bitcoin works as a decentralized digital currency using cryptography to regulate currency generation and verify fund transfers without a central bank. Key aspects covered include currency vs Bitcoin, Bitcoin expansion, cryptography basics like hashing and digital signatures, blockchain data structures, mining and proof-of-work consensus, and incentives to maintain the Bitcoin network.
Python, Blockchain, and Byte-Size ChangePortia Burton
Portia Burton gave a presentation on Python, blockchain, and byte-size changes. She began with an introduction and overview of blockchains and cryptocurrencies like Bitcoin. She then discussed Ethereum, smart contracts, and different consensus mechanisms. Burton explained how average developers can build blockchain applications using Python tools and libraries. She concluded by discussing potential impacts of blockchain technology on areas like democracy, finance, and the sharing economy.
Dappsmedia smartcontract _write_smartcontracts_on_console_ethereumTomoaki Sato
1. The document discusses smart contracts on the Ethereum blockchain, including what they are, common applications, and different types of smart contracts.
2. It provides steps to install the Ethereum blockchain using Geth, write an example token contract, publish the contract to the blockchain, and send transactions to the contract while checking the results.
3. The goal is to understand the end-to-end process of developing and deploying smart contracts on Ethereum from writing code to interacting with live contracts on the blockchain.
A comparison of blockchain technologies for distributed votingRoderik van der Veer
This slidedeck was used at the third Blockchain Vlaanderen meetup in Antwerp. It explores the currently available Blockchains and their capabilities within the context of voting in Belgium.
Basics you need to know about Solidity and how it works. Learn the simple way of building a smart contract in Solidity. Tools that can be used with Solidity.
Blockchain is a decentralized ledger or list of all transactions across a peer-to-peer network. It underlies technologies like Bitcoin and has potential to disrupt many business processes. No single user controls the blockchain, transactions are broadcast to the network and validated through consensus. The author of the blockchain concept is unknown, thought to use the pseudonym Satoshi Nakamoto. Blockchains use techniques like proof-of-work to serialize changes and achieve distributed consensus to maintain integrity without centralized authority.
Primer to smart contracts, smart property, trustless asset managementTim Swanson
Companion video at: http://youtu.be/VDRYZ122mXA
Tim Swanson discusses cryptocurrencies, cryptoledgers, smart contracts, smart property, decentralized autonomous organizations and cryptobarter. There are footnotes included as well. Filmed at Hacker Dojo on February 14, 2014 during Ethereum meetup. More info at: www.ofnumbers.com
Etherparty is a platform that allows users to create smart contracts on the Ethereum blockchain without any programming knowledge by selecting customizable templates. It aims to make smart contracts accessible to consumers and small businesses by removing the complexity of programming. The company is conducting a token sale to fund ongoing development and plans to offer various paid tiers of contract management and integration services to enterprises.
BLOCKCHAIN-BASED SMART CONTRACTS : A SYSTEMATIC MAPPING STUDY csandit
An appealing feature of blockchain technology is smart contracts. A smart contract is
executable code that runs on top of the blockchain to facilitate, execute and enforce an
agreement between untrusted parties without the involvement of a trusted third party. In this
paper, we conduct a systematic mapping study to collect all research that is relevant to smart
contracts from a technical perspective. The aim of doing so is to identify current research topics
and open challenges for future studies in smart contract research. We extract 24 papers from
different scientific databases. The results show that about two thirds of the papers focus on
identifying and tackling smart contract issues. Four key issues are identified, namely, codifying,
security, privacy and performance issues. The rest of the papers focuses on smart contract
applications or other smart contract related topics. Research gaps that need to be addressed in
future studies are provided.
Understanding Bitcoin (Blockchain) and its Potential for Disruptive ApplicationsIndicThreads
Presented at the IndicThreads.com Software Development Conference 2016 held in Pune, India. More at http://www.IndicThreads.com and http://Pune16.IndicThreads.com
--
This is an introduction to the exciting technology powering innovation in finance, contracting and many technology industries. This slideshow touches on the blockchain; what it is, its applications, it's disruptions and future cycle projections. The slideshow also touches on bitcoin as a popular application of blockchain technology.
Blockchain is a decentralized and distributed database where information is stored in blocks that are linked together in a chain. Transactions on the blockchain are verified by miners and added to the chain, where they cannot be altered. This allows blockchain to enable trustless transactions without centralized authorities. Smart contracts are programs stored on the blockchain that automatically execute transactions according to predetermined rules, allowing for applications like betting systems and supply chain management. Ethereum is a blockchain platform that runs smart contracts, allowing developers to write programs that control transactions and assets on the blockchain.
Cryptocurrency is a digital asset designed to work as a medium of exchange using cryptography to secure and verify transactions. Cryptography converts plain text into encrypted text to protect data and verify users. Cryptocurrencies like Bitcoin use blockchain technology, which records transactions in a digital ledger that is duplicated across all users, to allow electronic transfer of currency without a central authority. Users participate in mining to verify transactions and are rewarded with new currency. While legal status varies, cryptocurrencies offer benefits like low fees and anonymity but also risks like loss of funds if private keys are stolen.
Blockchain: it's much more than BitcoinKuba Tymula
This presentation (originally done for an event that Harris Partners has organised with Bank of America Merril Lynch in March 2016) covers basics of blockchain (definitions, features, establishing consensus, public key cryptography, public vs. private blockchains, permissionless vs. permissioned blockchains), as well as descriptions of Bitcoin, and other current use cases of the blockchain technology
This document summarizes a presentation on atomic swaps given to the Tucson Blockchain Developers group. Atomic swaps allow direct exchange of cryptocurrencies without a third party by using timelocks and hashlocks. The presentation covered how timelocks and hashlocks work, and how combining them enables atomic swaps between parties that have different cryptocurrencies, like one party with BTC and another with ETH. Important dates in the development of atomic swaps were also mentioned.
Blockchains can be used as backends for applications by utilizing smart contracts and storing data immutably on the blockchain. While blockchains are not ideal for all use cases due to their expensive and slow nature, they enable building decentralized applications where security is important. Developers can build apps that interact directly with smart contracts, or provide front ends that reference blockchain data without needing their own servers.
More Related Content
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Stefano Maestri - Blockchain and smart contracts, what they are and why you s...Codemotion
After a brief introduction on what is blockchain technology and how it works under the wood, focusing on Ethereum the next generation blockchain implementation. We will focus on the concept of smart contract introducing it through a simple case study and its standard implementation in ethereum. We will code it using Solidity language deploying and testing it in a live demo on Ethereum test network.
By the end of this webinar you should be able to understand
The concepts, use cases and basics of smart contracts
How Blockchain and smart contracts work and developer success
How smart contracts work on both the Ethereum and Hyperledger platforms from a practical level
The constructs of smart contract, common coding requirements and demos
What are the most in demand Blockchain Certifications?
How do these certification meet the needs of todays Enterprises?
What about Blockchain Career Demand?
Cryptocurrencies for Everyone (Dmytro Pershyn Technology Stream)IT Arena
The document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency as a digital currency that uses encryption techniques to regulate currency units and verify fund transfers outside of central bank control. Bitcoin is highlighted as the first decentralized digital currency, used for online payments and traded on exchanges. Key differences between traditional currencies and Bitcoin are outlined. The document then covers various technical elements that underpin cryptocurrencies like decentralization, distributed consensus, digital signatures, hash functions, and blockchain data structures. It provides examples of how cryptocurrency and Bitcoin systems work at a technical level.
Dylan Butler & Oliver Hager - Building a cross platform cryptocurrency appDevCamp Campinas
This document discusses building a cross-platform cryptocurrency application. It covers using a monorepo architecture for code reuse across mobile, desktop, and npm library applications. It also discusses developing cryptocurrency wallet features like generating transactions and signatures, smart contracts, and blockchain basics.
Blockchain Essentials and Blockchain on AzureNuri Cankaya
In this presentation I cover from the basics of Blockchain and deep-dive into the possibilities with Microsoft Azure on Blockchain projects.
What is Blockchain
Blockchain Disruption
Blockchain Business Scenarios
Microsoft’s Strategy on Blockchain
Blockchain 2.0: Smart Contracts
Blockchain 3.0: Cryptlets innovation
Blockchain on Microsoft Azure
Bletchley Project
Azure Blockchain Solutions
Smart contract honeypots for profit (and fun) - bhaPolySwarm
This document discusses various "smart contract honeypots" that appear vulnerable but are actually designed to exploit would-be attackers. It provides examples like a wallet with a reentrancy bug that doesn't actually allow funds to be stolen, and a gambling contract that displays a fake winning number. The document aims to educate about unintuitive behaviors in Ethereum and Solidity that honeypot designers exploit. It also notes the need for block explorer tools to carefully validate contract code and data.
This document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency and describes how Bitcoin works as a decentralized digital currency using cryptography to regulate currency generation and verify fund transfers without a central bank. Key aspects covered include currency vs Bitcoin, Bitcoin expansion, cryptography basics like hashing and digital signatures, blockchain data structures, mining and proof-of-work consensus, and incentives to maintain the Bitcoin network.
Python, Blockchain, and Byte-Size ChangePortia Burton
Portia Burton gave a presentation on Python, blockchain, and byte-size changes. She began with an introduction and overview of blockchains and cryptocurrencies like Bitcoin. She then discussed Ethereum, smart contracts, and different consensus mechanisms. Burton explained how average developers can build blockchain applications using Python tools and libraries. She concluded by discussing potential impacts of blockchain technology on areas like democracy, finance, and the sharing economy.
Dappsmedia smartcontract _write_smartcontracts_on_console_ethereumTomoaki Sato
1. The document discusses smart contracts on the Ethereum blockchain, including what they are, common applications, and different types of smart contracts.
2. It provides steps to install the Ethereum blockchain using Geth, write an example token contract, publish the contract to the blockchain, and send transactions to the contract while checking the results.
3. The goal is to understand the end-to-end process of developing and deploying smart contracts on Ethereum from writing code to interacting with live contracts on the blockchain.
A comparison of blockchain technologies for distributed votingRoderik van der Veer
This slidedeck was used at the third Blockchain Vlaanderen meetup in Antwerp. It explores the currently available Blockchains and their capabilities within the context of voting in Belgium.
Basics you need to know about Solidity and how it works. Learn the simple way of building a smart contract in Solidity. Tools that can be used with Solidity.
Blockchain is a decentralized ledger or list of all transactions across a peer-to-peer network. It underlies technologies like Bitcoin and has potential to disrupt many business processes. No single user controls the blockchain, transactions are broadcast to the network and validated through consensus. The author of the blockchain concept is unknown, thought to use the pseudonym Satoshi Nakamoto. Blockchains use techniques like proof-of-work to serialize changes and achieve distributed consensus to maintain integrity without centralized authority.
Primer to smart contracts, smart property, trustless asset managementTim Swanson
Companion video at: http://youtu.be/VDRYZ122mXA
Tim Swanson discusses cryptocurrencies, cryptoledgers, smart contracts, smart property, decentralized autonomous organizations and cryptobarter. There are footnotes included as well. Filmed at Hacker Dojo on February 14, 2014 during Ethereum meetup. More info at: www.ofnumbers.com
Etherparty is a platform that allows users to create smart contracts on the Ethereum blockchain without any programming knowledge by selecting customizable templates. It aims to make smart contracts accessible to consumers and small businesses by removing the complexity of programming. The company is conducting a token sale to fund ongoing development and plans to offer various paid tiers of contract management and integration services to enterprises.
BLOCKCHAIN-BASED SMART CONTRACTS : A SYSTEMATIC MAPPING STUDY csandit
An appealing feature of blockchain technology is smart contracts. A smart contract is
executable code that runs on top of the blockchain to facilitate, execute and enforce an
agreement between untrusted parties without the involvement of a trusted third party. In this
paper, we conduct a systematic mapping study to collect all research that is relevant to smart
contracts from a technical perspective. The aim of doing so is to identify current research topics
and open challenges for future studies in smart contract research. We extract 24 papers from
different scientific databases. The results show that about two thirds of the papers focus on
identifying and tackling smart contract issues. Four key issues are identified, namely, codifying,
security, privacy and performance issues. The rest of the papers focuses on smart contract
applications or other smart contract related topics. Research gaps that need to be addressed in
future studies are provided.
Understanding Bitcoin (Blockchain) and its Potential for Disruptive ApplicationsIndicThreads
Presented at the IndicThreads.com Software Development Conference 2016 held in Pune, India. More at http://www.IndicThreads.com and http://Pune16.IndicThreads.com
--
This is an introduction to the exciting technology powering innovation in finance, contracting and many technology industries. This slideshow touches on the blockchain; what it is, its applications, it's disruptions and future cycle projections. The slideshow also touches on bitcoin as a popular application of blockchain technology.
Blockchain is a decentralized and distributed database where information is stored in blocks that are linked together in a chain. Transactions on the blockchain are verified by miners and added to the chain, where they cannot be altered. This allows blockchain to enable trustless transactions without centralized authorities. Smart contracts are programs stored on the blockchain that automatically execute transactions according to predetermined rules, allowing for applications like betting systems and supply chain management. Ethereum is a blockchain platform that runs smart contracts, allowing developers to write programs that control transactions and assets on the blockchain.
Cryptocurrency is a digital asset designed to work as a medium of exchange using cryptography to secure and verify transactions. Cryptography converts plain text into encrypted text to protect data and verify users. Cryptocurrencies like Bitcoin use blockchain technology, which records transactions in a digital ledger that is duplicated across all users, to allow electronic transfer of currency without a central authority. Users participate in mining to verify transactions and are rewarded with new currency. While legal status varies, cryptocurrencies offer benefits like low fees and anonymity but also risks like loss of funds if private keys are stolen.
Blockchain: it's much more than BitcoinKuba Tymula
This presentation (originally done for an event that Harris Partners has organised with Bank of America Merril Lynch in March 2016) covers basics of blockchain (definitions, features, establishing consensus, public key cryptography, public vs. private blockchains, permissionless vs. permissioned blockchains), as well as descriptions of Bitcoin, and other current use cases of the blockchain technology
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This document summarizes a presentation on atomic swaps given to the Tucson Blockchain Developers group. Atomic swaps allow direct exchange of cryptocurrencies without a third party by using timelocks and hashlocks. The presentation covered how timelocks and hashlocks work, and how combining them enables atomic swaps between parties that have different cryptocurrencies, like one party with BTC and another with ETH. Important dates in the development of atomic swaps were also mentioned.
Blockchains can be used as backends for applications by utilizing smart contracts and storing data immutably on the blockchain. While blockchains are not ideal for all use cases due to their expensive and slow nature, they enable building decentralized applications where security is important. Developers can build apps that interact directly with smart contracts, or provide front ends that reference blockchain data without needing their own servers.
At this Meetup, Destry discussed the newly open-sourced multisig contract for Unchained Capital's ethereum storage. There is a blog post that covers some of the same material: https://blog.unchained-capital.com/a-simple-safe-multisig-ethereum-smart-contract-for-hardware-wallets-a107bd90bb52
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A Comprehensive Guide to DeFi Development Services in 2024Intelisync
DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
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Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
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HCL Notes and Domino License Cost Reduction in the World of DLAUpanagenda
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The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
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Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
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Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
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5. Introduction to Apache Kafka and S3
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6. Viewing Kafka Messages in the Data Lake
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7. What is Prometheus?
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9. What is Camel K?
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10. Configuring Camel K Integrations for Data Pipelines
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12. Jupyter Notebooks with Code Examples
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Main news related to the CCS TSI 2023 (2023/1695)Jakub Marek
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Introduction of Cybersecurity with OSS at Code Europe 2024Hiroshi SHIBATA
I develop the Ruby programming language, RubyGems, and Bundler, which are package managers for Ruby. Today, I will introduce how to enhance the security of your application using open-source software (OSS) examples from Ruby and RubyGems.
The first topic is CVE (Common Vulnerabilities and Exposures). I have published CVEs many times. But what exactly is a CVE? I'll provide a basic understanding of CVEs and explain how to detect and handle vulnerabilities in OSS.
Next, let's discuss package managers. Package managers play a critical role in the OSS ecosystem. I'll explain how to manage library dependencies in your application.
I'll share insights into how the Ruby and RubyGems core team works to keep our ecosystem safe. By the end of this talk, you'll have a better understanding of how to safeguard your code.
Building Production Ready Search Pipelines with Spark and MilvusZilliz
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.
Skybuffer SAM4U tool for SAP license adoptionTatiana Kojar
Manage and optimize your license adoption and consumption with SAM4U, an SAP free customer software asset management tool.
SAM4U, an SAP complimentary software asset management tool for customers, delivers a detailed and well-structured overview of license inventory and usage with a user-friendly interface. We offer a hosted, cost-effective, and performance-optimized SAM4U setup in the Skybuffer Cloud environment. You retain ownership of the system and data, while we manage the ABAP 7.58 infrastructure, ensuring fixed Total Cost of Ownership (TCO) and exceptional services through the SAP Fiori interface.
TBD - Sept 13, 2018 - Signed messages in ethereum - destry saul
1. Tucson Blockchain
Developers Meetup
The Rules:
1. No Prices.
2. No Politics
3. Don’t be an asshole
Signed Messages in Ethereum
Destry Saul
TBD - Sept 13, 2018
Look Up Here For The Point
Sponsors:
● Unchained Capital
● Borderland Brewery
3. Tucson Blockchain
Developers Meetup
Private Key = A huge number (1-232
)
Public Key = A different huge number derived from the Private Key
Public Key = function(Private Key)
A message = Any data
Signature = 3 numbers, all derived from the message and the private key
Signature = function(message, private key)
Quick Recap of Asymmetric Cryptography (it’s just math)
4. Tucson Blockchain
Developers Meetup
Keys and Signatures Diagrams
Signing
Function
Message
Signature
Public Key
Private Key
Public
Key
Function
Private Key
Message Signing
Public Key Derivation
5. Tucson Blockchain
Developers Meetup
If you have the signature and the message that was signed, you can compute
the public key.
Signature + Message => Public Key
Recover Function
Message
Signature
Public Key
6. Tucson Blockchain
Developers Meetup
1. The private key cannot be derived from the public key
2. Given a signature and a message, you can compute the public key that
corresponds to the private key that generated the signature.
This is the authentication method for blockchains:
Assets are controlled by addresses (public keys), signatures from private keys
authorize transactions.
The Promises of Asymmetric Cryptography
7. Tucson Blockchain
Developers Meetup
When you send a transaction to Ethereum, you’re submitting a block of data
along with a signature.
The signature must be generated by the private key of the account you are
sending the transaction from. If it’s not, the transaction is invalid.
Valid Transactions are messages with attached signatures
Signing
Function
Unsigned Transaction
Signature
Private Key
Transaction Signing
Ethereum
Network
8. Tucson Blockchain
Developers Meetup
Tx.origin is the recovered address from the transaction, but most contracts use
msg.sender:
Msg.sender equal to tx.origin for the first call, but if a contract makes an
external call, msg.sender is set equal to that contract’s address. Tx.origin is still
available.
Solidity Docs:
https://solidity.readthedocs.io/en/v0.4.24/units-and-global-variables.html
tx.origin is the recovered address from the transaction sig
9. Tucson Blockchain
Developers Meetup
The transaction signature is great, it’s a signature of all the data: eth value,
destination address, and data (which includes function calls and arguments).
But smart contracts are flexible! What is I want to verify a signature of
something else, by a different private key?
Not going to discuss WHY I would want to do that this time (come to the next
meetup!)
But what if we want to process a signature inside a contract?
10. Tucson Blockchain
Developers Meetup
ecrecover() is a solidity function, but not a simple one
Great! So with v, r, and s, and a 32 hash, we can recover an address.
huh?
That link goes to this stackoverflow page:
https://ethereum.stackexchange.com/questions/1777/workflow-on-signing-a-string-with-private-key-follo
wed-by-signature-verificatio